CATALOGUE. 335ceous, ofEen cEaffy beneath on the midrib, very sharply and often doxrblyserrate; the teeth with commonly appressed needle-like points, the base ofthe pinnse auricled on the upper and obliquely truncate on the lower side;sori abundant, forming a row each side the midrib midway between it andthe margin.—Enum. Fil. p. 236. Hooker, Sp. FU. iv, p. 10, t. 219. California generally, extending through Oregon to Nutka in the north and Guadalupe Island[Palmer) in the south. The largest and finest specimens are from Crescent City [Brewer), and PortOrford, Oregon [Gen. Kautz). One of the handsomest of American Ferns, and, like many others, subjectto considerable variations. The shaggy covering of the stalks and rachis consist usually of largocinnamon-brown chafiy, intermixed with much smaller acuminate scales of the same color, bat sometimestbe color is much darker, and the scales mostly confined to the very base of the stalk. Var. nudatnm. Frond smaller, the scales almost entirely lacking; pinnse few andrather remote, short and broad, oblong-oval, the teeth closely appressed;sori scanty, on the ends of the few uppermost pinnse. Nevada Fall, Yosemite, Prof. Wood. Also from Moore's Flat, on the Yuba Eiver, collectorunknown. The lower portion of the stalk is missing: this was probably somewhat scaly, but the partpreserved, and the whole frond, are absolutely naked, and have a pale, .almost glaucous appearance. Var. imbricans. Frond smallish, not narrowed at the base; pinnse crowded, lanceolate-oblong, pale, ascending and imbricated; fi:uit-dots nearer the margin thanthe midrib; stalk with shining brown lance-acuminate scales at the base,otherwise almost naked, as are the rachis and the frond. Eed Mountain, Mendocino Co. [Kellogg). Mts. near Trinity Eiver [Prof. Wood). Plumas Co.,Mrs. Austin. Still another form, with ample fronds, broad and somewhat incised pinnee, and scatteredsori, was collected by Dr. Lyall near the 49th parallel. **Fronds bipinnate, or nearly so. Aspidium aculeatum, Swartz. Rootstock stout, erect; stalks of variable length, commonly verychaffy, with large and small scales intermixed, as is the rachis; fronds 1-2feet long, forming a crown, oblong-lanceolate, pinnate; pinnse closelyplaced, lanceolate from a broad base, mostly curved upwards, inciselypinnatifid or again pinnate; the lobes or segments of variable shape, oval-rhomboidal, or unequally triangular-ovate and auriculate on the upper sideof the slightly stalked base, entire or serrate or incised, the lobes and teethof all degrees aculeate or needle-tipped; under surface more or less chaffy-